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Re: [Xen-devel] [RFC] change provided physical RAM map to add EBDA

To: Keir Fraser <keir@xxxxxxxxxxxxx>
Subject: Re: [Xen-devel] [RFC] change provided physical RAM map to add EBDA
From: Guillaume Thouvenin <guillaume.thouvenin@xxxxxxxxxxxx>
Date: Fri, 16 Mar 2007 07:50:39 +0000
Cc: Xen devel ML <xen-devel@xxxxxxxxxxxxxxxxxxx>, Ian Campbell <Ian.Campbell@xxxxxxxxxxxxx>
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On Thu, Mar 15, 2007 at 10:55:26AM +0000, Keir Fraser wrote:
> On 15/3/07 08:45, "Guillaume Thouvenin" <guillaume.thouvenin@xxxxxxxxxxxx>
> wrote:
> > My idea is to map the real memory region that contains EBDA to dom0. So
> > dom0 will see the real machine memory region under 640Ko (0xa0000) in is
> > own physical map.
> You're creating difficulties where there are none: dom0 already has a
> mapping of all memory below 1MB. Just use isa_bus_to_virt(0x40e).

Thank you for pointing the isa_bus_to_virt(), I had missed that.
I will look this solution quickly.

Best Regards,

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